Development of cesium telluride photocathodes for image intensifers

Shiyu Xu; Xiaofeng Li; Beihong Liu; Heng Zhao; Jiaojiao Li; Chao Chen; Le Chang; Shuntao He; Qijun Chen

doi:10.1117/12.2666669

4 April 2023 Development of cesium telluride photocathodes for image intensifers

Shiyu Xu, Xiaofeng Li, Beihong Liu, Heng Zhao, Jiaojiao Li, Chao Chen, Le Chang, Shuntao He, Qijun Chen

Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 1261764 (2023) https://doi.org/10.1117/12.2666669
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

We developed an UV Solar Blind image intensifiers with 18mm diameter semi-transparent cesium telluride photocathodes in a close proximity focus microchannel plates (MCP) tube. Cs-Te photocathodes have been evaporated onto quartz substrates at an elevated temperature to achieve quantum efficiency (QE) up to 34% and 70mA/W at 254nm, low dark current, low out of band response and high stability. New Cs-Te photocathodes have been fabricated for image intensifiers upgrade, which show fine image resolution, and less variation in high electron gain of the MCP. With these improvements, the image intensifier tube with new Cs-Te photocathodes will expand the application fields in low-light level UV Solar Blind detection.

Citation Download Citation

Shiyu Xu, Xiaofeng Li, Beihong Liu, Heng Zhao, Jiaojiao Li, Chao Chen, Le Chang, Shuntao He, and Qijun Chen "Development of cesium telluride photocathodes for image intensifers", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 1261764 (4 April 2023); https://doi.org/10.1117/12.2666669

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